[jdk21u-dev] RFR: 8330819: C2 SuperWord: bad dominance after pre-loop limit adjustment with base that has CastLL after pre-loop

Tue Jun 18 15:09:34 UTC 2024

Backport of [JDK-8330819](https://bugs.openjdk.org/browse/JDK-8330819). Doesn't apply cleanly. The fix needs to be integrated into a different file, because [JDK-8312332](https://bugs.openjdk.org/browse/JDK-8312332) is not in 21u. In addition, --enable-preview needs to get added in the test (see 2nd commit). Please review.

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Commit messages:
 - Enable preview in test.
 - Backport e681e9b4d78c57d031e08e11dfa6250d1f52f5f5

Changes: https://git.openjdk.org/jdk21u-dev/pull/744/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=744&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330819
  Stats: 119 lines in 2 files changed: 118 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/744.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/744/head:pull/744

PR: https://git.openjdk.org/jdk21u-dev/pull/744